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Lattice Boltzmann method formulation for simulation of thermal radiation effects on non-Newtonian Al_(2)O_(3) free convection in entropy determination

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Applied Mathematics and Mechanics(English Edition) 2024年第6期45卷 1085-1106页

作者： M.NEMATI M.SEFID A.KARIMIPOUR a.j.chamkha Faculty of Mechanical Engineering Yazd UniversityYazd ***Iran Department of Mechanical Engineering Najafabad BranchIslamic Azad UniversityNajafabad ***Iran Faculty of Engineering Kuwait College of Science and TechnologyDoha 35004Kuwait

The simultaneous investigation on the parameters affecting the flow of electrically conductive fluids such as volumetric radiation,heat absorption,heat generation,and magnetic field(MF)is very vital due to its existence in various sectors of industry and *** present research focuses on mathematical modeling to simulate the cooling of a hot component through power-law(PL)nanofluid convection *** temperature reduction of the hot component inside a two-dimensional(2D)inclined chamber with two different cold wall shapes is *** formulation of the problem is derived with the lattice Boltzmann method(LBM)by code writing via the FORTRAN *** variables such as the radiation parameter(0–1),the Hartmann number(0–75),the heat absorption/generation coefficient(−5–5),the fluid behavioral index(0.8–1.2),the Rayleigh number(103–105),the imposed MF angle(0°–90°),the chamber inclination angle(−90°–90°),and the cavity cold wall shape(smooth and curved)are *** findings indicate that the presence of radiation increases the mean Nusselt number value for the shear-thickening,Newtonian,and shear thinning fluids by about 6.2%,4%,and 2%,*** most cases,the presence of nanoparticles improves the heat transfer(HT)rate,especially in the cases where thermal conduction dominates *** is the lowest cooling performance index and MF effect for the cavity placed at an angle of 90°.The application in the design of electronic coolers and solar collectors is one of the practical cases of this numerical research.

关键词： thermal performance analysis heat absorption/generation power-law(PL)Al_(2)O_(3)nanofluid magnetohydrodynamics natural convection volumetric radiation inclined cavity

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Optimal treatment of stratified Carreau and Casson nanofluids flows in Darcy-Forchheimer porous space over porous matrix

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Applied Mathematics and Mechanics(English Edition) 2020年第11期41卷 1651-1670页

作者： R.KUMAR R.KUMAR S.A.SHEHZAD a.j.chamkha Department of Mathematics Central University of Himachal PradeshDharamshala 273001India Department of Mathematics COMSATS University IslamabadSahiwal 57000Pakistan Institute of Research and Development Duy Tan UniversityDa Nang 550000Vietnam Institute of Theoretical and Applied Research(ITAR) Duy Tan UniversityHanoi 100000Vietnam

A comparative three-dimensional(3D)analysis for Casson-nanofluid and Carreau-nanofluid flows due to a flat body in a magnetohydrodynamic(MHD)stratified environment is *** is estimated to be suspended in a Darcy-Forchheimer *** and Dufour responses are also accommodated in the flow field.A moving(rotating)coordinate system is exercised to examine the bidirectionally stretched flow fields(flow,heat transfer,and mass transfer).Nanofluid is compounded by taking ethylene glycol/sodium alginate as base fluid and ferric-oxide(Fe3O4)as *** equations are handled by the application of optimal homotopy asymptotic method(OHAM),where convergence parameters are optimized through the classical least square *** novel mechanism(hidden physics)due to appearing parameters is explored with the assistance of tabular and graphical *** reveal the double behavior state for temperature field with thermal stratification/Dufour number,and for concentration field with Soret number due to the presence of turning points.

关键词： thermal-solutal stratification Soret-Dufour effect Casson-Carreau nanofluid model porous matrix

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Effects of velocity and thermal wall slip on magnetohydrodynamics(MHD)boundary layer viscous flow and heat transfer of a nanofluid over a non-linearly-stretching sheet:a numerical study

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Propulsion and Power Research 2018年第2期7卷 182-195页

作者： Dodda Ramya R.Srinivasa Raju j.Anand Rao a.j.chamkha Department of Mathematics University College of ScienceOsmania UniversityHyderabad 500007Telangana StateIndia Department of Engineering Mathematics GITAM UniversityHyderabad CampusRudraram 502329Medak(Dt)Telangana StateIndia Mechanical Engineering Department Prince Mohammad Bin Fahd UniversityP.O.Box 1664Al-Khobar 31952Saudi Arabia

In this analysis,the boundary layer viscous flow of nanofluids and heat transfer over a non-linearly-stretching sheet in the presence of a magnetic field is *** and thermal slip conditions are considered instead of no slip conditions at the boundary.A similarity transformation set is used to transform the governing partial differential equations into non-linear ordinary differential *** reduced equations are solved numerically using the Keller box *** influence of the governing parameters on the dimensionless velocity,temperature,nanoparticle concentration as well as the skin friction coefficient,Nusselt number,and local Sherwood number are *** is found that as the velocity slip parameter increases,the velocity profile is decreased and the skin friction and heat transfer decreased while the mass transfer is *** the thermal slip parameter causes decreases in the heat and mass transfer *** results are presented in both graphical and tabular forms.

关键词： Magnetogydrodynamics(MHD) Nanofluid Non-linearly stretching sheet Velocity slip Thermal slip

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Interaction of Radiation and Turbulent Natural Convection:A Pseudo-Direct Numerical Study

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Advances in Applied Mathematics and Mechanics 2022年第6期14卷 1567-1586页

作者： Alexander Nee Ali j.chamkha Research and Educational Center of I.N.Butakov National Research Tomsk Polytechnic UniversityTomskRussia Faculty of Engineering Kuwait College of Science and TechnologyDoha DistrictKuwait

This paper presents a hybrid lattice Boltzmann solver for turbulent buoyancy-driven flow coupled with surface thermal *** two-relaxation time scheme for the Boltzmann equation combined with the implicit finite difference scheme for the energy equation is implemented to compute the heat transfer and fluid flow *** accuracy and robustness of the hybrid approach proposed in this study are assessed in terms of the numerical and experimental data of other *** performing the simulation,the Rayleigh number is ranged from 108 to 1010 whereas the surface emissivity is changed from zero to *** computations,it is found that the overall temperature of the cavity is increased as a result of enhancing the surface *** plumes are formed both at the isothermal and the thermally-insulated walls with the Ra109 and#*** the conditions under study,the overall heat transfer rate is raised by around 5%when taking into account the surface thermal radiation.

关键词： Pseudo-direct numerical simulation surface radiation hybrid lattice Boltzmann scheme turbulent natural convection.

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Magnetohydrodynamic flow and heat transfer impact on ZnO-SAE50 nanolubricant flow over an inclined rotating disk

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journal of Central South University 2019年第5期26卷 1146-1160页

作者： NAYAK M K MEHMOOD Rashid MAKINDE O D MAHIAN O chamkha Ali j Department of Physics Radhakrishna Institute of Technology and EngineeringBhubaneswar-752057India Department of Mathematics Faculty of Natural ScienceHITEC University Taxila-47070Pakistan Faculty of Military Science Stellenbosch UniversityPrivate Bag X2Saldanha 7395South Africa Center for Advanced Technologies Ferdowsi University of MashhadMashhadIran School of Aeronautic Science and Engineering Beihang UniversityBeijing 100191China Mechanical Engineering Department Prince Sultan Endowment for Energy and EnvironmentPrince Mohammad Bin Fahd UniversityAl-Khobar 31952Saudi Arabia RAK Research and Innovation Center American University of Ras Al KhaimahP.O.Box 10021Ras Al KhaimahUnited Arab Emirates

The present article has been fine-tuned with the investigation of mixed convection Darcy-Forchheimer flow of ZnO-SAE50 oil nanolubricant over an inclined rotating disk under the influence of uniform applied magnetic field applied to various *** current study has been enriched with additional consideration of slip flow,thermal radiation,viscous dissipation,joulian dissipation and internal *** view of augmentation of thermal conductivity of nanolubricant,a new micro-nano-convection model namely Patel model has been *** specialty of this model involves the effects of specific surface area and nano-convection due to Brownian motion of nanoparticles,kinetic theory based micro-convection,liquid layering and particle *** transformed governing equations have been solved numerically by using Runge-Kutta-Fehlberg *** analysis of the present study has shown that applied magnetic field,porosity of the medium,velocity slip and inertia coefficient account for the slowing down of radial as well as tangential flow of ZnO-SAE50 oil nanolubricant,thereby leading to an improvement in velocity and thermal boundary layers.

关键词： ZnO-SAE50 nanofluid Darcy-Forchheimer MHD flow thermal radiation velocity slip viscous dissipation internal heating

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CFD-Based Simulation and Analysis of Hydrothermal Aspects in Solar Channel Heat Exchangers with Various Designed Vortex Generators

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Computer Modeling in Engineering & Sciences 2021年第1期126卷 147-173页

作者： Mohamed Salmi Younes Menni Ali j.chamkha HouariAmeur Rachid Maouedj Ahmed Youcef Department of Physics University of M’silaM’sila28000Algeria Laboratory of Physics and Chemistry of Materials University of M’silaM’sila28000Algeria Unit of Research on Materials and Renewable Energies Department of PhysicsAbou Bekr Belkaid UniversityTlemcen13000Algeria Faculty of Engineering Kuwait College of Science and TechnologyDoha DistrictKuwait Center of Excellence in Desalination Technology King Abdulaziz UniversityJeddah21589Saudi Arabia Department of Technology University Center of NaamaNaama45000Algeria Unite de Recherche en Energies Renouvelables en Milieu Saharien URERMSCentre de Developpement des Energies RenouvelablesCDERAdrar01000Algeria

The hydrothermal behavior of air inside a solar channel heat exchanger equipped with various shaped ribs is analyzed *** bottom wall of the exchanger is kept adiabatic,while a constant value of the temperature is set at the upper *** duct is equipped with a flat rectangular fin on the upper wall and an upstream V-shaped baffle on the lower ***,five hot wall-attached rib shapes are considered:trapezoidal,square,triangular pointing upstream(type Ⅰ),triangular pointing downstream(type Ⅱ),and equilateral-triangular(type Ⅲ)cross *** of the flow rates are also inspected for various Reynolds numbers in the turbulent regime(1.2×10^(4)-3.2×10^(4)).The highest performance(η)value is given for the Ⅱ-triangular rib case in all Re values,while the square-shaped ribs show a significant decrease in the η along the achieved Re *** η value at Remax is 2.567 for the Ⅱ-triangular roughness *** with the other simulated cases,this performance is decreased by about 3.768%in the case of Ⅰ-triangular ribs,15.249% in the case of Ⅲ-triangular ribs,20.802% in the case of trapezoidal ribs,while 27.541% in the case of square ribs,at the same ***,a comparison ismade with air-heat exchangers that have non-rough walls and contain cross-shaped VGs presented previously,in order to highlight the effectiveness of the rough surface presence in the baffled and finned *** obtained results indicated that the triangular-shaped rib(type Ⅱ)has the most significant hydrothermal behavior than the other *** indicates the necessity of roughness heat transfer surfaces for finned and baffled channels to improve significantly the performance of the air-heat exchangers they contain.

关键词： CFD heat exchanger vortex generators ribs hydrothermal aspects

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Magnetohydrodynamic(MHD)boundary layer heat and mass transfer characteristics of nanofluid over a vertical cone under convective boundary condition

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Propulsion and Power Research 2018年第4期7卷 308-319页

作者： P.Sudarsana Reddy P.Sreedevi Ali j.chamkha Department of Mathematics RGM College of Eng.&TechNandyal 518501APIndia Mechanical Engineering Department Prince Mohammad Bin Fahd University.Al-Khobar 31952Kingdom of Saudi Arabia

This paper investigates the boundary layer flow,heat and mass transfercharacteristics over a vertical cone filled with nanofluid saturated porous medium with theinfluence of magnetic field,thermal radiation and first order chemical reaction subject to theconvective boundary *** transformation technique is used for the purpose ofconverting non-linear partial differential equations into the system of complex ordinarydifferential *** computational Finite element method has been employed to solvethe flow,heat and mass transfer equations together with boundary *** impact ofvarious pertinent parameters on hydrodynamic,thermal and solutal boundary layers isinvestigated and the results are displayed ***,the values of local skin-friction coefficient,rate of temperature and rate of concentration is also calculated and theresults are presented *** comparisons with previously published work is made andfound good *** thickness of thermal boundary layer is increased with increase inthe values of Brownian motion parameter(Nb)and thermophoresis parameter(Ni).

关键词： Heat andmasstransfer Vertical cone Nanofluid Convective boundary condition Finite elementmethod Chemical reaction

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Investigations of Soret,joule and Hall effects on MHD rotating mixed convective flow past an infinite vertical porous plate

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journal of Ocean Engineering and Science 2019年第3期4卷 263-275页

作者： M.Veera Krishna B.V.Swarnalathamma Ali j.chamkha Department of Mathematics Rayalaseema UniversityKurnoolAndhra Pradesh 518007India Department of Science and Humanities Stanley College of Engineering&Technology for WomenAbidsHyderabadTelangana 500001India Department of Mechanical Engineering Prince Sultan Endowment for Energy and EnvironmentPrince Mohammad Bin Fahd UniversityAl-Khobar 31952Saudi Arabia RAK Research and Innovation Center American University of Ras Al Khaimah10021United Arab Emirates

We made an elaborate scrutiny on the Soret and joule effects of MHD mixed convective flow of an incompressible and electrically conducting viscous fluid past an infinite vertical porous plate taking Hall effects into *** technique is used to solve the non-dimensional *** effects of the various non-dimensional parameters on velocity,temperature and concentration within the boundary layer are *** that,computational deliberations or discussions are also undertaken on the effects of the pertinent or significant parameters on the skin-friction coefficient and rates of heat and mass transfer in terms of the Nusselt and Sherwood numbers *** concentration distribution increases with increase in Soret effect and decrease with increase in chemical reaction *** increase in Prandtl number results to decrease the temperature *** the primary and secondary velocity components and temperature increases with increasing heat source *** friction coefficient decreases with an increase in permeability parameter,whereas it shows reverse effect for thermal and mass Grashof *** number increases with an increase in Prandtl *** number reduces with increasing Soret number.

关键词： Hall effects Soret number Porous medium joules dissipation Chemical reaction

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Effects of homogeneous-heterogeneous reactions and thermal radiation on magneto-hydrodynamic Cu-water nanofluid flow over an expanding flat plate with non-uniform heat source

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journal of Central South University 2019年第5期26卷 1161-1171页

作者： DOGONCHI A S chamkha Ali j HASHEMI-TILEHNOEE M SEYYEDI S M RIZWAN-UL-HAQ GANjI D D Department of Mechanical Engineering Aliabad Katoul BranchIslamic Azad UniversityAliabad KatoulIran Mechanical Engineering Department Prince Sultan Endowment for Energy and EnvironmentPrince Mohammad Bin Fahd UniversityAl-Khobar 31952Saudi Arabia RAK Research and Innovation Center American University of Ras Al KhaimahP.O.Box 10021Ras Al KhaimahUnited Arab Emirates Department of Electrical Engineering Bahria UniversityIslamabadPakistan Mechanical Engineering Department Babol Noshirvani University of TechnologyBabolIran

This study presents the effect of non-uniform heat source on the magneto-hydrodynamic flow of nanofluid across an expanding plate with consideration of the homogeneous-heterogeneous reactions and thermal radiation effects.A nanofluid’s dynamic viscosity and effective thermal conductivity are specified with Corcione *** to this correlation,the thermal conductivity is carried out by the Brownian *** transformations reduce the governing equations concerned with energy,momentum,and concentration of nanofluid and then numerically *** influences of the effective parameters,e.g.,the internal heat source parameters,the volume fraction of nanofluid,the radiation parameter,the homogeneous reaction parameter,the magnetic parameter,the heterogeneous parameter and the Schmidt number are studied on the heat and flow transfer ***,regarding the effective parameters of the present work,the correlation for the Nusselt number has been *** outcomes illustrate that with the raising of the heterogeneous parameter and the homogeneous reaction parameter,the concentration profile *** addition,the outcomes point to a reverse relationship between the Nusselt number and the internal heat source parameters.

关键词： nanofluid non-uniform heat source homogeneous-heterogeneous reactions thermal radiation Brownian motion

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Darcy-Forchheimer relation in Casson type MHD nanofluid flow over non-linear stretching surface

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Propulsion and Power Research 2020年第2期9卷 159-168页

作者： Ghulam Rasool Ali j.chamkha Taseer Muhammad Anum Shafiq Ilyas Khan School of Mathematical Sciences Zhejiang UniversityHangzhouZhejiang310027China Mechanical Engineering Department Prince Mohammad Bin Fahd UniversityAl-Khobar31952Saudi Arabia Department of Mathematics College of ScienceKing Khalid University.Abha61413Saudi Arabia School of Mathematics and Statistics Nanjing University of Information Science and TechnologyNanjing210044China Faculty of Mathematics and Statistics Ton Due Tltang UniversityHo Chi Minh City72915Viet Nam

Present article aims to discuss the characteristics of Casson type nanofluid maintained to flow through porous medium over non-linear stretching surface in the perspective of heat and mass transfer developments.A Casson type incompressible viscous nanofluid passes through the given porous medium via Darcy-Forchheimer *** boundary conditions are used for velocity,temperature and concentration of the *** diffusion and thermophoresis is *** induced magnetic field effect is involved to accentuate the thermo-physical characteristics of the *** model incorporates boundary layer formulations and small magnetic Reynolds for practical validity.A fourth order Runge-Kutta(RK)scheme is enforced to solve the system *** are prepared for various progressive values of non-dimensionalized parameters whereas;variation in wall drag factor,heat and mass transfer rates is analyzed through numerical *** indicate that momentum boundary layer reduces for stronger inertial impact and the resistance offered by the porous media to the fluid *** is found as a progressive function for the Brownianmotion factor and *** magnitude of wall drag factor,heat transfer and masstransfer rates shows reduction for progressive values of slip parameters.

关键词： Casson type nanofluid Darcy-Forchheimer Magnetohydrodynamic(MHD) Nonlinear stretching Slip-boundary conditions

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